Manufacturer directory
Glow-worm Boiler Fault Codes
Fault-code information for Glow-worm boilers, grouped by verified boiler range. Each entry is linked to its own fault-code page.
Popular boiler ranges
Verified fault-code index
Flexicom cx
View range- F1 — Flexicom cx
Ignition fault.
Read fault code - F22 — Flexicom cx
Low water pressure or ignition temperature rise too slow.
Read fault code - F25 — Flexicom cx
Circulation fault.
Read fault code - F3 — Flexicom cx
Fan unable to reach ignition speed.
Read fault code - F5 — Flexicom cx
Overheat fault.
Read fault code - F77 — Flexicom cx
Condensate pump error (optional).
Read fault code - F9 — Flexicom cx
Water pressure sensor fault, blocked flow filter or pump fault.
Read fault code
Flexicom sx
View range- F1 — Flexicom sx
Ignition fault.
Read fault code - F22 — Flexicom sx
Low water pressure or ignition temperature rise too slow.
Read fault code - F25 — Flexicom sx
Circulation fault.
Read fault code - F3 — Flexicom sx
Fan unable to reach ignition speed.
Read fault code - F5 — Flexicom sx
Overheat fault.
Read fault code - F77 — Flexicom sx
Condensate pump error (optional).
Read fault code - F9 — Flexicom sx
Low water pressure sensor fault.
Read fault code
Ultracom hxi
View range- F1 — Ultracom hxi
Ignition fault.
Read fault code - F22 — Ultracom hxi
Low water pressure or ignition temperature rise too slow.
Read fault code - F25 — Ultracom hxi
Circulation fault.
Read fault code - F3 — Ultracom hxi
Fan unable to reach ignition speed.
Read fault code - F5 — Ultracom hxi
Overheat fault.
Read fault code - F77 — Ultracom hxi
Condensate pump error (optional).
Read fault code - F9 — Ultracom hxi
Water pressure sensor fault, blocked flow filter or pump fault.
Read fault code